Connected: An Internet Encyclopedia
RFC 791 - 2.1. Relation to Other Protocols

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### 2.1. Relation to Other Protocols

The following diagram illustrates the place of the internet protocol in the protocol hierarchy:

         +------+ +-----+ +-----+     +-----+
         |Telnet| | FTP | | TFTP| ... | ... |
         +------+ +-----+ +-----+     +-----+
               |   |         |           |
              +-----+     +-----+     +-----+
              | TCP |     | UDP | ... | ... |
              +-----+     +-----+     +-----+
                 |           |           |
              +--------------------------+----+
              |    Internet Protocol & ICMP   |
              +--------------------------+----+
                             |
                +---------------------------+
                |   Local Network Protocol  |
                +---------------------------+

                 Protocol Relationships

                       Figure 1.

Internet protocol interfaces on one side to the higher level host-to-host protocols and on the other side to the local network protocol. In this context a "local network" may be a small network in a building or a large network such as the ARPANET.

Next: 2.2. Model of Operation

Connected: An Internet Encyclopedia
RFC 791 - 2.1. Relation to Other Protocols